package gov.nist.javax.sip.parser.ims;
/*
* Conditions Of Use 
* 
* This software was developed by employees of the National Institute of
* Standards and Technology (NIST), an agency of the Federal Government.
* Pursuant to title 15 Untied States Code Section 105, works of NIST
* employees are not subject to copyright protection in the United States
* and are considered to be in the public domain.  As a result, a formal
* license is not needed to use the software.
* 
* This software is provided by NIST as a service and is expressly
* provided "AS IS."  NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
* OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
* AND DATA ACCURACY.  NIST does not warrant or make any representations
* regarding the use of the software or the results thereof, including but
* not limited to the correctness, accuracy, reliability or usefulness of
* the software.
* 
* Permission to use this software is contingent upon your acceptance
* of the terms of this agreement
*  
* .
* 
*/
import java.text.ParseException;
import javax.sip.InvalidArgumentException;
import gov.nist.javax.sip.header.SIPHeader;
import gov.nist.javax.sip.header.ims.PAssertedService;
import gov.nist.javax.sip.header.ims.ParameterNamesIms;
import gov.nist.javax.sip.parser.HeaderParser;
import gov.nist.javax.sip.parser.Lexer;
import gov.nist.javax.sip.parser.TokenTypes;

/**
 * 
 * @author aayush.bhatnagar
 * Rancore Technologies Pvt Ltd, Mumbai India.
 * 
 * Parse this: 
 * P-Asserted-Service: urn:urn-7:3gpp-service.exampletelephony.version1
 *
 */
public class PAssertedServiceParser extends HeaderParser implements TokenTypes{

	protected PAssertedServiceParser(Lexer lexer) {
		super(lexer);
	}
	
	public PAssertedServiceParser(String pas)
	{
		super(pas);
	}
	
	public SIPHeader parse() throws ParseException {
		if(debug)
			dbg_enter("PAssertedServiceParser.parse");
		try
		{
		this.lexer.match(TokenTypes.P_ASSERTED_SERVICE);
		this.lexer.SPorHT();
		this.lexer.match(':');
		this.lexer.SPorHT();
		
		PAssertedService pps = new PAssertedService();
	    String urn = this.lexer.getBuffer();
	    if(urn.contains(ParameterNamesIms.SERVICE_ID)){
	    	
	       if(urn.contains(ParameterNamesIms.SERVICE_ID_LABEL))
	    		   {
	    	        String serviceID = urn.split(ParameterNamesIms.SERVICE_ID_LABEL+".")[1];
	    	        
	    	         if(serviceID.trim().equals(""))
						try {
							throw new InvalidArgumentException("URN should atleast have one sub-service");
						} catch (InvalidArgumentException e) {
							
							e.printStackTrace();
						}
						else
	    	        pps.setSubserviceIdentifiers(urn.split(ParameterNamesIms.SERVICE_ID_LABEL)[1]);
	    		   }
	       else if(urn.contains(ParameterNamesIms.APPLICATION_ID_LABEL))
	    	  {
	    	   String appID = urn.split(ParameterNamesIms.APPLICATION_ID_LABEL+".")[1];
	    	   if(appID.trim().equals(""))
					try {
						throw new InvalidArgumentException("URN should atleast have one sub-application");
					} catch (InvalidArgumentException e) {
						e.printStackTrace();
					}
					else
	    		  pps.setApplicationIdentifiers(urn.split(ParameterNamesIms.APPLICATION_ID_LABEL)[1]);
	    	  }
	       else
	       {
	    	   try {
				throw new InvalidArgumentException("URN is not well formed");
				
			} catch (InvalidArgumentException e) {
				e.printStackTrace();
			        }
	              }
	      }
	    
	    	super.parse();
	        return pps;    
		}
		finally{
			if(debug)
				dbg_enter("PAssertedServiceParser.parse");
		}
		
	}
}
